Mechanical Dial Dehumidistat for Air Exchangers

The Fantech MDEH1 mechanical dial dehumidistat mounts on the wall and controls a compatible air exchanger based on the home’s relative humidity. You pick a set point on the rotary dial; when humidity goes above it, the exchanger ventilates more to remove the humid air.

Less condensation on the windows in winter

In Québec, in winter, the outdoor air is very dry. Swapping the home’s humid air for that dry air lowers indoor humidity. That is the dehumidistat’s job: make the exchanger work at the right time, when showers, cooking or laundry have pushed humidity up, and leave it on low the rest of the time. The result: less water on the windows and less risk of mould in cold corners.

Adjusting the set point by season

• The colder it is outside, the lower the set point should be.
• If condensation appears on the windows, lower the set point slightly.
• If the air gets too dry, raise it.

Simple and mechanical

The MDEH1 is set with the dial, with no menu or screen. For a model with an indicator light, see the mechanical dehumidistat with indicator light. Install it in a central area, away from the bathroom and the kitchen, and cut power to the exchanger before wiring. Send us your exchanger model: we confirm compatibility.

Installed by AirGreen in Greater Montréal

Our technicians install the dehumidistat and adjust the air exchanger in Montréal, Laval, Longueuil, on the South Shore and on the North Shore. RBQ licence 5645-9605-01. For availability or a quote, call us at 514 316-2973 or email sales@airgreen.ca with your air exchanger model.